### QPx_RotateAreaImage

QPx_RotateAreaImage(areaRef; numDegrees; rotateOptions; backColor):error
| areaRef | Longint | QPix area reference
| numDegrees | Real | Rotation degrees
| rotateOptions | Longint | Options
| backColor | Longint | Background color
| error | Longint | Error result

Rotates the image in a QPix plug-in area by a number of degrees.

The QPix plug-in area is specified by areaRef. If areaRef is not a valid QPix plug-in area reference, qpx_paramErr is returned.

The number of degrees is specified in the numDegrees parameter. Positive values cause clockwise rotation, while negative values rotate the picture counter-clockwise.

The rotateOptions paramater is optional. It can be used to specify options for the rotation operation. The following constants can be combined with bitwise "or".

qpx_RotateHighQuality | 0x0004 | High quality rotation
qpx_RotateFillBackground | 0x0800 | Fill background with specified color

Parameter backColor is also optional, and is meaningful only when the qpx_RotateFillBackground is specified in rotateOptions. It specifies the fill color of the background area when rotating by non-multiples of 90 degrees. 4D's 0xRRGGBB notation is used.

Example

``Rotate area image by 90 degrees counter-clockwise` `` `C_LONGINT($error)` `` `$error:=QPx_RotateAreaImage (gQPixArea;-90)` ``

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